33645240427 has 2 divisors, whose sum is σ = 33645240428. Its totient is φ = 33645240426.

The previous prime is 33645240403. The next prime is 33645240557. The reversal of 33645240427 is 72404254633.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 33645240427 - 2¹⁹ = 33644716139 is a prime.

It is a super-2 number, since 2×33645240427² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33645240427.

It is not a weakly prime, because it can be changed into another prime (33645240127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16822620213 + 16822620214.

It is an arithmetic number, because the mean of its divisors is an integer number (16822620214).

Almost surely, 2^33645240427 is an apocalyptic number.

33645240427 is a deficient number, since it is larger than the sum of its proper divisors (1).

33645240427 is an equidigital number, since it uses as much as digits as its factorization.

33645240427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 40.

The spelling of 33645240427 in words is "thirty-three billion, six hundred forty-five million, two hundred forty thousand, four hundred twenty-seven".